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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoThermodynamicsMedium2 minQB

PhysicsMediummultiple choice

A certain amount of perfect gas undergoes changes in pressure and volume as shown in figure. During this change from A to B.

Options:(select one or more)

Answer:

B, C, D

Solution:

From the grid: $P_{A} V_{A} = 2 \times 20 = 40$ and $P_{B} V_{B} = 8 \times 5 = 40$ , so the curve is $P V =$ const: an isotherm. Hence $T$ and $U$ constant, $W > 0$ (expansion), and heat IS absorbed equal to $W$ (A false).

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Thermodynamics

⏱ 2mℹ️ Source: QB

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